What distinguishes tribal governments from local and state governments?
a. tribal governments are bicameral.
b. tribal governments do not have to follow state constitutions.
c. tribal governments have no legislative powers.
d. tribal governments are considered sovereign nations.

D)Tribal governments are considered sovereign nations is what distinguishes tribal governments from local and state governments. In the United States, they are specifically seen as "domestic dependent nations", and these governments are sometimes called Tribal Councils and usually exist in the United States and Canada on First Nations Reservations.